
import java.util.Objects;

/**
 * Created with IntelliJ IDEA
 * Description:
 * User: lv
 * Date: 2023-03-18
 * Time: 20:36
 */

class Person{
    public String ID;

    public Person(String ID) {
        this.ID = ID;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        Person person = (Person) o;
        return Objects.equals(ID, person.ID);
    }

    @Override
    public int hashCode() {
        return Objects.hash(ID);
    }

    @Override
    public String toString() {
        return "Person{" +
                "ID='" + ID + '\'' +
                '}';
    }

}


public class HashBuck2<K,V>{

    static class Node<K,V>{
        public K key;
        public V val;
        public Node<K,V> next;

        public Node(K key,V val){
            this.key=key;
            this.val=val;
        }
    }

    public Node<K,V>[] array =(Node<K,V>[]) new Node[10];
    public int usedSize;

    public void put(K key,V val){
        int hash = key.hashCode();
        int index =hash  % array.length;

        Node<K,V> cur = array[index];
        while(cur!=null){
            if(cur.key.equals(key)){
                cur.val=val;//更新value值
                return ;
            }
            cur=cur.next;
        }

        Node<K,V> node =new Node<>(key,val);
        node.next=array[index];
        array[index]=node;
        this.usedSize++;

    }

    public V get(K key){
        int hash = key.hashCode();
        int index =hash  % array.length;

        Node<K,V> cur = array[index];
        while(cur!=null){
            if(cur.key.equals(key)){
                return cur.val;
            }
            cur=cur.next;
        }
        return null;
    }


    public static void main(String[] args) {
        Person person1=new Person("123");
        Person person2=new Person("123");

        HashBuck2<Person,String> hashBuck2 = new HashBuck2<>();
        hashBuck2.put(person1,"bit");

        System.out.println(hashBuck2.get(person2));

    }


    public static void main1(String[] args) {
        //hashcode
        Person person1=new Person("123");
        Person person2=new Person("123");

        System.out.println(person1.hashCode());
        System.out.println(person2.hashCode());
    }
}



